package com.kasinf.springcloud.controller;

import com.kasinf.springcloud.entity.CommonResult;
import com.kasinf.springcloud.entity.Payment;
import com.kasinf.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RequestMapping("payment")
@RestController
@Slf4j
public class OrderController {

        public static final String PAYMENT_URL = "http://localhost:8001";
//    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;

    @GetMapping("create")
    public CommonResult<Payment> create(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL + "/payment", payment, CommonResult.class);
    }

    @GetMapping("{id}")
    public CommonResult<Payment> getPayment(@PathVariable Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/" + id, CommonResult.class);
    }

    @GetMapping("getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable Long id) {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/" + id, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()) {
            log.info("头信息：{}", entity.getHeaders());
            log.info("状态码：{}", entity.getStatusCode());
            return entity.getBody();
        }
        return new CommonResult<>(444, "查询失败");
    }

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("lb")
    public String getPaymentLB() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (instances == null || instances.size() == 0) {
            return null;
        }
        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri + "/payment/lb", String.class);
    }

    @GetMapping("zipkin")
    public String paymentZipkin() {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/zipkin", String.class);
    }
}
